Once the radiant Greek god of the sun, music, archery, and prophecy, the immortal Apollo wakes in a New York City dumpster, stripped of his powers and trapped in the body of a soft, acne-prone sixteen-year-old mortal named Lester Papadopoulos. His father Zeus has cast him down as punishment, and the only road back to Olympus runs through a series of ancient Oracles that have fallen silent. Bound into servitude by a fierce, garbage-flinging twelve-year-old demigod named Meg McCaffrey, the deflated former deity makes his way to Camp Half-Blood, where he learns that campers have been vanishing and that the camp's link to the outside world has gone dark. With old friends offering uneasy help and a shadowy corporate power working behind the scenes, the god who once commanded worship must relearn how to be brave, how to fail, and how to depend on others. The narration, delivered in Apollo's own gloriously self-absorbed voice and punctuated by his terrible haiku, turns a story of humbling into something funny and surprisingly tender. As the mystery of the missing campers tightens around Meg's hidden past, the unlikely pair confront an enemy far older and crueler than either expected. Mortality forces the god to reckon with centuries of careless cruelty toward the humans and demigods who served him, and the lessons land harder than any arrow he once loosed.